Malicious PDF — malware analysis report

Static analysis result for SHA-256 81566057c944198f…

MALICIOUS

PDF

72.8 KB Created: 2020-11-18 09:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c3e224e42dd42741529f94038816c39f SHA-1: 72be3509f4557b1accd149699de485e7aa53f6f0 SHA-256: 81566057c944198fc1c327fd8255eed7703917566c00de228cde29cc1e159ee6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains an embedded URL pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/123?utm_term=do+birth+certificates+have+blood+type PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5f977a2d6c4d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_5f97c9d786225.pdfIn PDF document text
    • https://zewuxufasebi.weebly.com/uploads/1/3/4/3/134320084/4b59278.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/8096390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_5fb483e3ea5a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_5fb27be28678d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_5f9a646d1d7f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f89f57841e2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5f9964b70d7b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jotizifime/escalation_protocol_boss_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec8adb6-e21b-48a3-a4d5-3d39a912591b/34926138043.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D1 5224 bytes
SHA-256: 870f713d212f495c33899235906891f912e1fd138b8e194b28c37354b79c3453
font_01_sfnt_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 10116 bytes
SHA-256: 1f6e9e850f7c7a56e48a3f765a3b1cff65ce166446fb8873fe963f088e9a5c86
font_02_sfnt_off00010853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10853 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71